JPH10662A - Injection molding method - Google Patents
Injection molding methodInfo
- Publication number
- JPH10662A JPH10662A JP15199796A JP15199796A JPH10662A JP H10662 A JPH10662 A JP H10662A JP 15199796 A JP15199796 A JP 15199796A JP 15199796 A JP15199796 A JP 15199796A JP H10662 A JPH10662 A JP H10662A
- Authority
- JP
- Japan
- Prior art keywords
- mold
- molding material
- resin
- ultrasonic
- injection molding
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C45/00—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor
- B29C45/17—Component parts, details or accessories; Auxiliary operations
- B29C45/46—Means for plasticising or homogenising the moulding material or forcing it into the mould
- B29C45/56—Means for plasticising or homogenising the moulding material or forcing it into the mould using mould parts movable during or after injection, e.g. injection-compression moulding
- B29C45/568—Applying vibrations to the mould parts
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C45/00—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor
- B29C45/0025—Preventing defects on the moulded article, e.g. weld lines, shrinkage marks
Landscapes
- Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- Mechanical Engineering (AREA)
- Moulds For Moulding Plastics Or The Like (AREA)
- Injection Moulding Of Plastics Or The Like (AREA)
Abstract
Description
【０００１】[0001]
【発明の属する技術分野】本発明は射出成形方法に関
し、さらに詳しくは、複雑な形状の成形品について、ウ
エルドラインにおけるウエルド強度を向上させることの
できる射出成形方法に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an injection molding method, and more particularly to an injection molding method capable of improving a weld strength in a weld line of a molded article having a complicated shape.
【０００２】[0002]
【従来の技術】射出成形方法は、様々な形状の成形品を
大量に正確に生産するのに適した成形方法であるが、成
形品の形状が複雑な場合、ウエルドラインと呼ばれる細
い線が成形品に発生することが知られている。このウエ
ルドラインは、成形品の美観上の点から好ましくないば
かりか、成形品の機械的強度を著しく低下させるもので
ある。特に、成形品の形状上、例えば窓や穴となる部分
の周辺では樹脂が合流することが不可避であるため、ウ
エルドラインが発生しやすく、かかる部分が成形品にお
いて大きな問題となっていた。2. Description of the Related Art Injection molding is a method suitable for accurately producing a large number of molded articles of various shapes. However, when the shape of molded articles is complicated, a thin line called a weld line is formed. It is known to occur in goods. This weld line is not only unfavorable from the viewpoint of the aesthetic appearance of the molded product, but also significantly reduces the mechanical strength of the molded product. In particular, due to the shape of the molded product, for example, it is inevitable that the resin merges around a portion to be a window or a hole, so that a weld line is easily generated, and such a portion has been a serious problem in the molded product.
【０００３】このようなウエルドラインを解消する方法
として、種々の方法、とりわけ成形時に超音波振動を利
用する方法が提案されている。例えば、ゲート部や偏肉
部等ウエルドラインやヒケを生じやすいところに入れ駒
を挿入して超音波振動を付与する方法（特開昭５２−１
０９５５６号公報）、ウエルドラインが発生しやすい場
所に超音波振動子を組み込んだ金型を用いて、溶融樹脂
を充填する際に超音波振動を付与する方法（特開平０４
−０９０３０９号公報）、樹脂合流部のようなウエルド
ラインが発生しやすい場所の金型部分に超音波発振装置
を配設することにより、樹脂配向を攪乱するような流れ
を与える方法（特開平０６−２６２６２８号公報）が開
示されている。[0003] As a method for eliminating such a weld line, various methods have been proposed, especially a method utilizing ultrasonic vibration during molding. For example, a method of applying an ultrasonic vibration by inserting an insert piece into a weld line or a place where a sink is likely to occur such as a gate portion or an uneven thickness portion (Japanese Patent Laid-Open No. 52-1)
No. 09556), a method of applying ultrasonic vibration at the time of filling a molten resin using a mold incorporating an ultrasonic vibrator in a place where a weld line is likely to occur (Japanese Patent Laid-Open No.
Japanese Patent Application Laid-Open No. H06-090309), a method of providing a flow that disturbs resin orientation by disposing an ultrasonic oscillator in a mold portion where a weld line is likely to occur, such as a resin merging portion. -262628).
【０００４】しかしながら、これらの技術においては、
いずれも金型におけるある部分に集中して超音波振動を
付与することを特徴としており、そのため金型が複雑な
構造をとらざるを得ないという欠点がある。さらに効率
よくウエルドライン発生部分に付与できるとも限らず、
未だ十分な成果が得られていない。However, in these technologies,
Each of them is characterized in that the ultrasonic vibration is applied to a certain portion of the mold, so that there is a disadvantage that the mold has to take a complicated structure. It is not always possible to efficiently apply to the weld line generation part,
Sufficient results have not yet been obtained.
【０００５】[0005]
【発明が解決しようとする課題】本発明は、上述の問題
に鑑みなされたものであり、複雑な構造の金型も必要と
せず、しかも効率的にウエルドラインの発生を防止で
き、機械強度に優れる成形品を得ることのできる射出成
形方法を提供することを目的とする。SUMMARY OF THE INVENTION The present invention has been made in view of the above-mentioned problems, and does not require a mold having a complicated structure. In addition, it is possible to efficiently prevent the occurrence of weld lines and improve mechanical strength. An object of the present invention is to provide an injection molding method capable of obtaining an excellent molded product.
【０００６】[0006]
【課題を解決するための手段】本発明者等は上記目的を
達成するために、鋭意研究を重ねた結果、射出成形法に
おける超音波振動の効率的な付与方法を見い出し、発明
を完成するに至った。即ち、本発明は、成形材料を射出
成形する方法において、少なくとも、溶融した成形材料
の金型への充填終了時から成形材料が固化し終わるまで
の間における任意の時間、金型全体に超音波振動を付与
することを特徴とする射出成形方法を提供するものであ
る。Means for Solving the Problems The present inventors have conducted intensive studies in order to achieve the above object, and as a result, have found a method of efficiently applying ultrasonic vibration in the injection molding method, and have completed the invention. Reached. That is, the present invention relates to a method for injection molding a molding material, wherein at least an arbitrary time from the end of filling the molten molding material into the mold to the end of solidification of the molding material, ultrasonic waves are applied to the entire mold. An object of the present invention is to provide an injection molding method characterized by applying vibration.
【０００７】[0007]
【発明の実施の形態】以下、本発明の射出成形方法を具
体的に説明する。 １．射出成形の範囲 本発明における射出成形方法は、多色成形方法、射出圧
縮成形方法等を含み、さらに、成形機からの流動状態ま
たはゴム様状態の成形材料を金型内に圧入し、所定の形
状に賦形した後、成形品を取り出す方法を採用する全て
の成形方法を含むものである。 ２．射出成形機 本発明においては、射出成形機としては特に制限はな
く、通常用いられるものが用いられる。BEST MODE FOR CARRYING OUT THE INVENTION Hereinafter, the injection molding method of the present invention will be specifically described. 1. Scope of Injection Molding The injection molding method of the present invention includes a multicolor molding method, an injection compression molding method, and the like.Furthermore, a molding material in a fluid state or a rubber-like state from a molding machine is pressed into a mold, and a predetermined It includes all molding methods employing a method of taking out a molded product after shaping into a shape. 2. Injection molding machine In the present invention, the injection molding machine is not particularly limited, and a commonly used injection molding machine is used.
【０００８】金型についても特に制限はないが、固定金
型と可動金型とからなるものが一般に用いられる。固定
金型としては、特に制限はなく、たとえばその形態とし
て、中心軸にスプルーを有する汎用のものを挙げること
ができる。また、可動金型としても、特に制限はなく、
たとえば、その形態として、前記固定金型とほぼ同心に
当接して配設される汎用のものを挙げることができる。
必要に応じて、可動金型は後述するＬ−Ｌ変換体に配設
される。金型の材質としては、金属、セラミックス、グ
ラファイト等を挙げることができるが、超音波の伝達損
失が少ない材質、例えばチタン合金、ジュラルミン等を
用いることが好ましい。Although there is no particular limitation on the mold, a mold composed of a fixed mold and a movable mold is generally used. There is no particular limitation on the fixed mold, and for example, a general-purpose mold having a sprue on a central shaft can be given as the form. Also, there is no particular limitation on the movable mold,
For example, as a form thereof, a general-purpose type that is disposed substantially in concentric contact with the fixed mold can be cited.
If necessary, the movable mold is disposed on an LL converter described below. Examples of the material of the mold include metals, ceramics, and graphite, and it is preferable to use a material having a small transmission loss of ultrasonic waves, such as a titanium alloy or duralumin.
【０００９】本発明においては、超音波により振動する
部分は、固定金型と可動金型とからなる金型全体及び必
要に応じて可動金型に配設されるＬ−Ｌ変換体である。 ３．超音波発振装置 （１）超音波発振器 超音波発振器は、共振体の共振周波数を予め超音波振動
子の追尾可能な周波数となるように設計、製作しておく
ことにより、成形機のノズルをスプルーに圧接させ、成
形材料をスプルーを介してキャビティに供給する場合の
刻々の負荷変動に対する共振周波数の変化に対し常に追
尾を行なうことが可能になり、また必要電力の供給も刻
々の変化に応じて必要量（最大出力以下）を供給するよ
うに設定することが可能になる。In the present invention, the portion vibrated by the ultrasonic wave is the entire mold including the fixed mold and the movable mold, and the LL converter disposed on the movable mold as required. 3. Ultrasonic oscillator (1) Ultrasonic oscillator An ultrasonic oscillator is designed and manufactured in advance so that the resonance frequency of the resonator becomes a frequency that can be tracked by the ultrasonic transducer, thereby allowing the nozzle of the molding machine to be sprued. When the molding material is supplied to the cavity via the sprue, it is possible to constantly track the change in the resonance frequency with respect to the instantaneous load fluctuation, and the supply of the necessary power also follows the instantaneous change. It can be set to supply the required amount (less than the maximum output).
【００１０】振動周波数 本発明において用いられる超音波振動の振動周波数は、
１［ＫＨｚ］〜１０［ＭＨｚ］が好ましく、成形時の材
料に超音波をきわめて有効に作用させるためには１０
［ＫＨｚ］〜１００［ＫＨｚ］がさらに好ましい。 振幅 本発明において用いられる超音波振動の振幅は、大きい
方がその効果を十分発揮できるため、金型の材質の疲労
度に合わせて設定するのが望ましい。 （２）Ｌ−Ｌ変換体 Ｌ−Ｌ変換体とは、超音波発振器からの振動の伝播方向
を９０度変換するものである。これにより、必ずしも、
超音波発振器を金型部とほぼ同心に当接して配設する必
要はなく、心方向に９０度曲がった位置に取付けること
が可能となることから、好ましく用いられる。 ４．超音波付与方法 （１）超音波付与により共振する部分 固定金型と可動金型とからなる金型全体及び必要に応じ
て可動金型に配設されるＬ−Ｌ変換体からなる共振体
に、前記超音波発振器から発振する所定の振動数の超音
波を付与することにより、該共振体が、ｎ波長（ｎ＝１
／２ｍ，ｍは正の整数）で共振する。 （２）共振のさせ方 超音波振動を最も効率よく金型部に伝播させるために
は、金型部とＬ−Ｌ変換体の接続部が共振の腹部と一致
することが望ましい。さらに、共振の腹部をキャビティ
の形成位置と一致させるのが望ましい。これにより、キ
ャビティ部の振動は大きくなり、注入される樹脂等の成
形材料と金型壁面との接触抵抗を最も効率よく低減させ
ることが可能となる。また、共振の節部を固定金型保持
部、可動金型保持部及び射出ユニットのノズル接触部と
一致させるように振動を与えることが好ましい。これに
より、固定金型保持部、可動金型保持部及び射出ユニッ
トのノズル接触部では振動を小さくすることができ、振
動伝播によるエネルギー損失を最小限に止めることがで
きる。そのためには、なるべく節数の少ないｎ＜３とす
ることが好ましい。 （３）超音波振動の付与 超音波振動は、少なくとも、溶融した成形材料の金型へ
の充填終了時から成形材料が固化し終わるまでの間にお
ける任意の時間、金型全体に付与することが必要であ
る。ウエルドラインは成形材料の固化開始から固化終了
までの間に主として発生するものであるから、成形材料
の固化が始まった直後から固化終了までの間、超音波振
動を付与し続けるのが最も効果的である。即ち、少なく
とも、充填が終了した時点から、保圧時にかけて超音波
振動付与を行うことが望ましい。具体的には、溶融した
成形材料の充填終了後、３０秒以内、好ましくは２０秒
以内の時間、超音波振動を付与するのがよい。Vibration Frequency The vibration frequency of the ultrasonic vibration used in the present invention is:
1 [KHz] to 10 [MHz] is preferable.
[KHz] to 100 [KHz] is more preferable. Amplitude The amplitude of the ultrasonic vibration used in the present invention is preferably set in accordance with the degree of fatigue of the material of the mold because the larger the amplitude, the more the effect can be exhibited. (2) LL Converter The LL converter converts the propagation direction of the vibration from the ultrasonic oscillator by 90 degrees. This does not necessarily mean that
It is not necessary to dispose the ultrasonic oscillator substantially concentrically with the mold portion, and the ultrasonic oscillator is preferably used because it can be mounted at a position bent 90 degrees in the direction of the center. 4. Ultrasonic wave application method (1) Portion resonating by ultrasonic wave application The whole mold composed of a fixed mold and a movable mold and, if necessary, a resonator composed of an LL converter disposed in the movable mold. By applying an ultrasonic wave having a predetermined frequency oscillating from the ultrasonic oscillator, the resonator is made to have n wavelengths (n = 1).
/ 2m, m is a positive integer). (2) How to Make Resonance In order to transmit ultrasonic vibrations to the mold part most efficiently, it is desirable that the connection part between the mold part and the LL converter coincides with the antinode of resonance. Further, it is desirable to match the resonance antinode to the position where the cavity is formed. As a result, the vibration of the cavity becomes large, and the contact resistance between the molding material such as the injected resin and the mold wall surface can be reduced most efficiently. Further, it is preferable to apply vibration so that the resonance node coincides with the fixed mold holding section, the movable mold holding section, and the nozzle contact section of the injection unit. Accordingly, vibration can be reduced in the fixed mold holding section, the movable mold holding section, and the nozzle contact section of the injection unit, and the energy loss due to vibration propagation can be minimized. For this purpose, it is preferable that n <3, which has as few nodes as possible. (3) Application of Ultrasonic Vibration Ultrasonic vibration can be applied to the entire mold at least for an arbitrary time from the end of filling the molten molding material into the mold to the end of solidification of the molding material. is necessary. Since the weld line is mainly generated between the start of solidification of the molding material and the end of solidification, it is most effective to keep applying ultrasonic vibration immediately after the solidification of the molding material starts until the end of solidification. It is. That is, it is desirable to apply the ultrasonic vibration at least from the time when the filling is completed to the time when the pressure is maintained. Specifically, it is preferable to apply ultrasonic vibration within 30 seconds, preferably within 20 seconds after filling of the molten molding material is completed.
【００１１】もっとも、超音波振動の付与を開始する時
点は、成形材料の充填終了時と限る必要はなく、充填開
始前或いは後の任意の時点から超音波振動を付与を行っ
てもよい。ただし、この場合においても、充填終了後か
らの一定時間付与することは必要である。 ５．成形材料 本発明に用いられる成形材料としては、プラスチック等
の有機材料、無機高分子，セラミックス，金属，ガラス
等の無機材料、その他食料品およびそれらの混合材料等
の、成形時に若干の流動性を有する材料を挙げることが
できる。ここで、プラスチックとしては、たとえば、α
−オレフィン系樹脂（ポリエチレン，ポリプロピレン，
ポリスチレン，シンジオタクティクポリスチレン，塩化
ビニル樹脂，ポリブテン，超高分子量ポリエチレン，ポ
リメチルペンテン，アイオノマー，ポリブチレン等）、
ポリエステル系樹脂、ポリエーテル系樹脂、ポリカーボ
ネート系樹脂、ポリアミド系樹脂、メタクリル系樹脂、
フッソ系樹脂、メタクリレート−ブタジエン−スチレン
系樹脂、アクリレート−アクリロニトリル−スチレン系
樹脂、アクリロニトリル−スチレン系樹脂、アクリロニ
トリル−ブタジエン−スチレン系樹脂、ポリアセタール
系樹脂、セルロース系樹脂、ポリ塩化ビニリデン、塩素
化ポリエチレン、エチレン−ビニルアセテート系樹脂、
ポリウレタン樹脂、シリコーン樹脂、アリル樹脂、フラ
ン樹脂、液晶性ポリマー、エポキシ樹脂、ポリブタジエ
ン樹脂、シリコーン樹脂、不飽和ポリエステル樹脂、ア
ミノ樹脂、スチレン−ブタジエン系エラストマー、ポリ
エステル系エラストマー、ポリエチレン系エラストマ
ー、ウレタン系エラストマー、塩化ビニル系エラストマ
ー等を挙げることができる。However, the time at which the application of the ultrasonic vibration is started is not limited to the time when the filling of the molding material is completed, and the ultrasonic vibration may be applied from any time before or after the start of the filling. However, in this case as well, it is necessary to provide for a certain period of time after completion of filling. 5. Molding material As the molding material used in the present invention, there is a slight fluidity during molding, such as organic materials such as plastics, inorganic polymers, inorganic materials such as ceramics, metals and glass, and other foodstuffs and their mixed materials. Materials. Here, as plastic, for example, α
-Olefin resins (polyethylene, polypropylene,
Polystyrene, syndiotactic polystyrene, vinyl chloride resin, polybutene, ultra-high molecular weight polyethylene, polymethylpentene, ionomer, polybutylene, etc.),
Polyester resin, polyether resin, polycarbonate resin, polyamide resin, methacrylic resin,
Fluoro resin, methacrylate-butadiene-styrene resin, acrylate-acrylonitrile-styrene resin, acrylonitrile-styrene resin, acrylonitrile-butadiene-styrene resin, polyacetal resin, cellulose resin, polyvinylidene chloride, chlorinated polyethylene, Ethylene-vinyl acetate resin,
Polyurethane resin, silicone resin, allyl resin, furan resin, liquid crystal polymer, epoxy resin, polybutadiene resin, silicone resin, unsaturated polyester resin, amino resin, styrene-butadiene elastomer, polyester elastomer, polyethylene elastomer, urethane elastomer And vinyl chloride-based elastomers.
【００１２】[0012]
【実施例】以下、本発明を実施例によってさらに具体的
に説明する。 ［実施例１］図１に示すように、本実施例においては、
その中心軸部分にスプルー５を有する、ジュラルミン２
０２４からなる固定金型３に、ジュラルミン２０２４か
らなる可動金型４をほぼ同心に当接して配設した。この
場合、固定金型３は、固定金型固定板２によって、ま
た、可動金型４は可動金型保持部材１１によってそれぞ
れ固定されている。EXAMPLES The present invention will be described more specifically with reference to the following examples. [Embodiment 1] As shown in FIG.
Duralumin 2 having a sprue 5 at its central shaft portion
The movable mold 4 made of duralumin 2024 was disposed almost concentrically on the fixed mold 3 made of 024. In this case, the fixed mold 3 is fixed by the fixed mold fixing plate 2, and the movable mold 4 is fixed by the movable mold holding member 11.
【００１３】また、固定金型３の一端部と可動金型４の
一端部とによって、その形状が矩形で、厚さが２ｍｍの
キャビティ６を形成している。また、可動金型４の別の
一端部にはＬ−Ｌ変換体８が接続され、当Ｌ−Ｌ変換体
８には超音波振動子７（精電舎電子工業社製 ＳＯＮＯ
ＰＥＴ１２００Ｂ；基本周波数１９．１５ＫＨｚ）を接
合した。A cavity 6 having a rectangular shape and a thickness of 2 mm is formed by one end of the fixed mold 3 and one end of the movable mold 4. An LL converter 8 is connected to another end of the movable mold 4, and the ultrasonic transducer 7 (SONO manufactured by Seidensha Electronics Co., Ltd.) is connected to the LL converter 8.
(PET1200B; fundamental frequency 19.15 KHz).
【００１４】また、可動金型固定板９に固定した突出し
ピン１２は、キャビティ６内で成形された成形品を突き
出して取り出すため、油圧シリンダー１１によって可動
に配設されている。また、成形機のノズル１が、固定金
型３のスプルー５の入口に当接して配設されている。こ
のような、射出成形装置に、成形材料としてポリスチレ
ン（出光石油化学株式会社製ＨＦ１０）を用いて、以下
の条件で射出成形を行い、成形品の引張強度を測定し
た。結果を表１に示す。A projecting pin 12 fixed to the movable mold fixing plate 9 is movably provided by a hydraulic cylinder 11 for projecting and removing a molded product formed in the cavity 6. Further, the nozzle 1 of the molding machine is disposed in contact with the inlet of the sprue 5 of the fixed mold 3. Using such an injection molding apparatus, injection molding was performed using polystyrene (HF10 manufactured by Idemitsu Petrochemical Co., Ltd.) as a molding material under the following conditions, and the tensile strength of the molded product was measured. Table 1 shows the results.
【００１５】 型締力 ２５［ｔｏｎ］ 射出圧力 ９４０［Ｋｇｆ／ｃｍ2 ］ 樹脂温度 ２００［℃］ 金型温度 ４０［℃］ 振幅 １０［μｍ］ 共振 図２に示す１.5波長共振 超音波振動の付与 溶融樹脂の充填終了後、１０秒間 ［比較例１］実施例１において、超音波を付与しなかっ
たこと以外は実施例１と同様にした。実施例１と同様に
成形を行い、成形品の引張強度を測定した。結果を第１
表に示す。Mold clamping force 25 [ton] Injection pressure 940 [Kgf / cm 2 ] Resin temperature 200 [° C] Mold temperature 40 [° C] Amplitude 10 [μm] Resonance 1.5 wavelength resonance shown in Fig. 2 Ultrasonic vibration (Comparative Example 1) The procedure of Example 1 was repeated, except that no ultrasonic wave was applied. Molding was performed in the same manner as in Example 1, and the tensile strength of the molded article was measured. First result
It is shown in the table.
【００１６】[0016]
【表１】 ［実施例２］実施例１と同じ射出成形機を用いて、成形
材料としてポリカーボネート及びＡＢＳ樹脂のブレンド
品（ブレンド比率６０：４０）（出光石油化学株式会社
製ＳＣ２５３）を用いて、以下の条件で射出成形を行
い、成形品の曲げ強度を測定した。結果を表２に示す。[Table 1] [Example 2] Using the same injection molding machine as in Example 1, using a blended product of polycarbonate and ABS resin (blend ratio 60:40) (SC253, manufactured by Idemitsu Petrochemical Co., Ltd.) as a molding material, under the following conditions: And the bending strength of the molded product was measured. Table 2 shows the results.
【００１７】 型締力 ２５［ｔｏｎ］ 射出圧力 ９４０［Ｋｇｆ／ｃｍ2 ］ 樹脂温度 ２３０［℃］ 金型温度 ５０［℃］ 振幅 １０［μｍ］ 共振 図２に示す１.5波長共振 超音波振動の付与 溶融樹脂の充填終了後、２０秒間 ［比較例２］実施例２において、超音波を付与しなかっ
たこと以外は実施例１と同様にした。実施例２と同様に
成形を行い、成形品の曲げ強度を測定した。結果を第２
表に示す。Mold clamping force 25 [ton] Injection pressure 940 [Kgf / cm 2 ] Resin temperature 230 [° C] Mold temperature 50 [° C] Amplitude 10 [μm] Resonance 1.5 wavelength resonance shown in Fig. 2 Ultrasonic vibration [Comparative Example 2] The procedure of Example 2 was repeated, except that no ultrasonic wave was applied. The molding was performed in the same manner as in Example 2, and the bending strength of the molded product was measured. Second result
It is shown in the table.
【００１８】[0018]
【表２】 [Table 2]
【００１９】[0019]
【発明の効果】本発明によって、特別な構造を必要とせ
ず、汎用の射出成形機及び金型を用いて、効率的にウエ
ルドラインの発生を防止でき、機械強度に優れる成形品
を得ることのできる射出成形方法が提供される。According to the present invention, the use of a general-purpose injection molding machine and a metal mold, which does not require a special structure, can efficiently prevent the occurrence of weld lines and provide a molded article having excellent mechanical strength. A possible injection molding method is provided.
【図１】実施例または比較例において用いた射出成形装
置を模式的に示す概略断面図である。FIG. 1 is a schematic sectional view schematically showing an injection molding apparatus used in an example or a comparative example.
【図２】実施例または比較例ににおける金型部及びＬ−
Ｌ変換体からなる共振体の共振状態（１.5 波長共振）
を模式的に示す説明図である。FIG. 2 shows a mold part and L-
Resonant state of resonator consisting of L converter (1.5 wavelength resonance)
It is explanatory drawing which shows typically.
１ ノズル ２ 固定金型固定板 ３ 固定金型 ４ 可動金型 ５ スプルー ６ キャビティ ７ 超音波振動子 ８ Ｌ−Ｌ変換体 ９ 可動金型固定板 １０ 可動金型保持部材 １１ 油圧シリンダー １２ 突出しピン DESCRIPTION OF SYMBOLS 1 Nozzle 2 Fixed mold fixed plate 3 Fixed mold 4 Movable mold 5 Sprue 6 Cavity 7 Ultrasonic vibrator 8 LL converter 9 Movable mold fixing plate 10 Movable mold holding member 11 Hydraulic cylinder 12 Projection pin
Claims (1)
少なくとも、溶融した成形材料の金型への充填終了時か
ら成形材料が固化し終わるまでの間における任意の時
間、金型全体に超音波振動を付与することを特徴とする
射出成形方法。1. A method for injection molding a molding material, comprising:
An injection molding method characterized in that ultrasonic vibration is applied to the entire mold at least for an arbitrary time from the end of filling the molten molding material into the mold to the end of solidification of the molding material.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP15199796A JP3453476B2 (en) | 1996-06-13 | 1996-06-13 | Injection molding method and injection molding device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP15199796A JP3453476B2 (en) | 1996-06-13 | 1996-06-13 | Injection molding method and injection molding device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH10662A true JPH10662A (en) | 1998-01-06 |
| JP3453476B2 JP3453476B2 (en) | 2003-10-06 |
Family
ID=15530816
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP15199796A Expired - Lifetime JP3453476B2 (en) | 1996-06-13 | 1996-06-13 | Injection molding method and injection molding device |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP3453476B2 (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2002063891A (en) * | 2000-08-21 | 2002-02-28 | Shin Kobe Electric Mach Co Ltd | Cast-on strap welding device and cast-on strap welding method |
| EP1728615A1 (en) * | 2005-06-02 | 2006-12-06 | Ems-Chemie Ag | Process for equalizing orientation and/or distribution of fillers in injection moulded parts |
| WO2008032484A1 (en) * | 2006-09-13 | 2008-03-20 | Panasonic Corporation | Method of molding polylactic acid resin |
-
1996
- 1996-06-13 JP JP15199796A patent/JP3453476B2/en not_active Expired - Lifetime
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2002063891A (en) * | 2000-08-21 | 2002-02-28 | Shin Kobe Electric Mach Co Ltd | Cast-on strap welding device and cast-on strap welding method |
| JP4538922B2 (en) * | 2000-08-21 | 2010-09-08 | 新神戸電機株式会社 | Cast on strap welding apparatus and cast on strap welding method |
| EP1728615A1 (en) * | 2005-06-02 | 2006-12-06 | Ems-Chemie Ag | Process for equalizing orientation and/or distribution of fillers in injection moulded parts |
| KR100798993B1 (en) | 2005-06-02 | 2008-01-28 | 이엠에스-케미 에이지 | Method for equalising the orientation of fillers and/or distribution of fillers in injection moulded parts |
| WO2008032484A1 (en) * | 2006-09-13 | 2008-03-20 | Panasonic Corporation | Method of molding polylactic acid resin |
| EP1925420A1 (en) * | 2006-09-13 | 2008-05-28 | Matsushita Electric Industrial Co., Ltd. | Method of molding polylactic acid resin |
| JPWO2008032484A1 (en) * | 2006-09-13 | 2010-01-21 | パナソニック株式会社 | Molding method of polylactic acid resin |
| JP4804482B2 (en) * | 2006-09-13 | 2011-11-02 | パナソニック株式会社 | Molding method of polylactic acid resin |
| EP1925420A4 (en) * | 2006-09-13 | 2012-08-01 | Panasonic Corp | Method of molding polylactic acid resin |
Also Published As
| Publication number | Publication date |
|---|---|
| JP3453476B2 (en) | 2003-10-06 |
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